According to an NPD DisplaySearch report, Apple was the top mobile PC vendor for the fourth quarter of 2011 and the rest of the year -- if you consider iPads to be mobile PCs. In the fourth quarter, Apple shipped almost 23.4 million MacBooks and iPads, and over 62.8 million for the entire year. The NPD numbers show that almost 80 percent of the Apple totals consisted of iPads (18.7 million in the fourth quarter, 48.4 million for all of 2011). The analysis for that final quarter o